<template>
	<view>
		<my-search @myclick="gotoSearch()"></my-search>
		
		<view class="scroll-view-container">
			<!-- 左侧滑动区域 -->
			<scroll-view scroll-y="true" :style="{height: wh + 'px'}" class="left-scroll-view">
				<block v-for="(item, i) in cateList" :key="i">
					<view :class="['left-scroll-view-item', i === active ? 'active' : '']"
					@click="activeChanged(i)">{{item.cat_name}}</view>
				</block>
				
			</scroll-view>
			<!-- 右侧滑动区域 -->
			<scroll-view scroll-y="true" :style="{height: wh + 'px'}" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item2, i2) in cateLecel2" :key="i2">
					<!-- 二级分类的标题 -->
					<view class="cate-lv2-title">
						/{{item2.cat_name}}/
					</view>
					<!-- 三级分类列表 -->
					<view class="cate-lv3-list">
						<view class="cate-lv3-item" v-for="(item3, i3) in item2.children"
						:key="i3"
						@click="gotoGoodsList(item3)">
							<!-- 三级分类图片 -->
							<image :src="item3.cat_icon.replace('dev','web')"></image>
							<!-- 三级分类标题 -->
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
		
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
		mixins: [badgeMix],
		data() {
			return {
				// 当前设备可用的高度
				wh: 0,
				// 分类列表数据
				cateList: [],
				active: 0,
				cateLecel2: [],
				scrollTop: 0
			};
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoSync()
			this.wh = sysInfo.windowHeight - 50
			// 获取分类列表数据
			this.getCateList()
			
		},
		methods: {
			// 获取分类列表数据
			async getCateList() {
				const {data: res} = await uni.$http.get('/api/public/v1/categories')
				if(res.meta.status !== 200) return uni.$showMsg()
				this.cateList = res.message
				// 为二级分类赋值
				this.cateLecel2 = res.message[0].children
			},
			activeChanged(i) {
				this.active = i
				// 为二级分类重新赋值
				this.cateLecel2 =this.cateList[i].children
				this.scrollTop = this.scrollTop === 0 ? 1 : 0
			},
			gotoGoodsList(item) {
				uni.navigateTo({
					url: `/subpkg/goods_list/goods_list?cid=${item.cat_id}`
				})
			},
			gotoSearch() {
				uni.navigateTo({
					url: '/subpkg/searchl/searchl'
				})
			}
		}
	}
</script>

<style lang="scss">
	// 分类区域
	.scroll-view-container {
		display: flex;
		background-color: #fff;
		// 右侧滑动区域
		.left-scroll-view {
			width: 120px;
			
			.left-scroll-view-item {
				background-color: #f7f7f7;
				line-height: 60px;
				text-align: center;
				font-size: 12px;
				
				&.active {
					background-color: #fff;
					position: relative;
					&::before {
						content: '';
						display: block;
						width: 3px;
						height: 30px;
						background-color: #c00000;
						position: absolute;
						top: 50%;
						left: 0;
						transform: translateY(-50%);
					}
				}
			}
		}
	}
	
	.cate-lv2-title {
		font-size: 12px;
		font-weight: bold;
		text-align: center;
		padding: 15px 0;
	}
	
	.cate-lv3-list {
		display: flex;
		flex-wrap: wrap;
		.cate-lv3-item {
			width: 33.33%;
			display: flex;
			flex-direction: column;
			justify-content: center;
			align-items: center;
			margin-bottom: 10px;
			image{
				width: 60px;
				height: 60px;
				
			}
			text {
				font-size: 12px;
			}
		}
	}
</style>
